HYDRAULIC LANDING GEAR HLGOPERATION AND SERVICE MANUAL

TABLE OF CONTENTS

SYSTEM……………………………………………........….…..Warning…………………………………........……....Prior to Operation…………………….......………System Description………………………………..Preventative Maintenance……….......………..

COMPONENTS…………………………………........……………Warning.........................................................Mechanical Components….............………….Electrical Components....…….............……...Auxiliary Operation....…………............……….Component Layout.......................................

SERVICE…………………………..………………........………Filling Procedures........................................Troubleshooting…………………….........………

Chart..................................................Pump Unit.........................................

Wiring Diagram…………………….….......………Ordering Parts..............................................

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SYSTEM

WARNINGFAILURE TO ACT IN ACCORDANCE WITH THE FOLLOWING MAY

RESULT IN SERIOUS PERSONAL INJURY OR DEATH.

THE USE OF THE LIPPERT HYDRAULIC LANDING GEAR TO SUPPORT THECOACH FOR ANY REASON OTHER THAN WHICH IT IS INTENDED ISPROHIBITED BY LIPPERT’S LIMITED WARRANTY. THE LIPPERT LEVELINGSYSTEM IS DESIGNED AS A “LEVELING” SYSTEM ONLY AND SHOULD NOTBE USED TO PROVIDE SERVICE FOR ANY REASON UNDER THE COACHSUCH AS CHANGING TIRES OR SERVICING THE LEVELING SYSTEM.

LIPPERT COMPONENTS, INC. RECOMMENDS THAT A TRAINEDPROFESSIONAL BE EMPLOYED TO CHANGE THE TIRE ON THE COACH.ANY ATTEMPTS TO CHANGE TIRES OR PERFORM OTHER SERVICE WHILECOACH IS SUPPORTED BY THE LIPPERT HYDRAULIC LANDING GEARCOULD RESULT IN DAMAGE TO THE COACH AND/OR CAUSE SERIOUSPERSONAL INJURY OR DEATH.

WARNING! – BE SURE TO PARK THE COACH ON SOLID, LEVEL GROUND.

WARNING! – CLEAR ALL JACK LANDING LOCATIONS OF DEBRIS AND OBSTRUCTIONS. LOCATIONS SHOULD ALSO BE FREE OF DEPRESSIONS.

WARNING! – WHEN PARKING THE COACH ON EXTREMELY SOFT SURFACES, UTILIZE LOAD DISTRIBUTION PADS UNDER EACH JACK.

WARNING! - PEOPLE AND PETS SHOULD BE CLEAR OF COACH WHILE OPERATING LEVELING SYSTEM.

WARNING! – BE SURE TO KEEP HANDS AND OTHER BODY PARTS CLEAR OF FLUID LEAKS. OIL LEAKS IN THE LIPPERT HYDRAULIC LANDING GEAR MAY BE UNDER HIGH PRESSURE AND CAN CAUSE SERIOUS SKIN PENETRATING INJURIES.

WARNING! - NEVER LIFT THE COACH COMPLETELY OFF THE GROUND. LIFTING THE COACH SO THE WHEELS ARE NOT TOUCHING GROUND WILL CREATE AN UNSTABLE AND UNSAFE CONDITION.

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PRIOR TO OPERATION

The leveling system shall only be operated under the following conditions:1. The unit is parked on a reasonably level surface.2. The towing vehicle is disengaged from the unit.3. Be sure all person, pets and property are clear of the coach while

Lippert Leveling System is in operation.

SYSTEM DESCRIPTION

Please read and study the operating manual before you operate the levelingsystem.

The Lippert Hydraulic Landing Gear is an electric/hydraulic system. A 12V DCelectric motor drives a hydraulic pump that moves fluid through a system ofhoses, fittings and jacks to level and stabilize the coach.

There are no serviceable parts within the electric motor. If the motor fails, it mustbe replaced.

Disassembly of the motor voids the warranty.

Mechanical portions of the Lippert Hydraulic Landing Gear are replaceable.Contact Lippert Components, Inc. to obtain replacement parts.

COMPONENT DESCRIPTION The Lippert Hydraulic Landing Gear consists of thefollowing major components:

Lippert Landing Gear are rated at a lifting capacity appropriate for your coach.

Each Landing Gear is powered from a central 12VDC motor/pump assembly, whichalso includes the hydraulic oil reservoir tank, control valve manifold, and solenoidvalves.

The Lippert Hydraulic Landing Gear is controlled electronically from the switchnear the pump.

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PREVENTATIVE MAINTENANCE PROCEDURES

The Lippert Hydraulic Landing Gear has been designed to require very littlemaintenance. To ensure the long life of your slideout system, read and followthese few simple procedures.

1. Change fluid every 36 months.a) Check fluid only when jacks are fully retracted.b) Always fill the reservoir with the jacks in the fully retracted position. Filling

reservoir when jacks are extended will cause reservoir to overflow into itscompartment when jacks are retracted.

c) When checking fluid level, fluid should be within ¼” of fill spout lip.

2. Check the fluid level every month.

3. Inspect and clean all Pump Unit electrical connections every 12 months.

4. Remove dirt and road debris from Landing Gear as needed.

WARNING:YOUR COACH SHOULD BE SUPPORTED AT BOTH FRONT AND REAR

AXLES WITH JACK STANDS BEFORE WORKING UNDERNEATH.FAILURE TO DO SO MAY RESULT IN PERSONAL INJURY OR DEATH.

5. If jacks are down for extended periods, it is recommended to spray exposed Landing Gear rod with a silicone lubricant every seven days for protection. If your coach is located in a salty environment, it is recommended to spray the rods every 2 to 3 days.

IF YOU HAVE ANY PROBLEMS OR QUESTIONS CONSULT YOUR LOCALAUTHORIZED DEALER OR CALL LIPPERT AT:

(866) 524-7821.

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COMPONENTS

WARNING!DO NOT WORK ON YOUR SLIDEOUT SYSTEM UNLESS

THE BATTERY IS DISCONNECTED.FAILURE TO ACT IN ACCORDANCE WITH THE FOLLOWING MAY

RESULT IN SERIOUS PERSONAL INJURY OR DEATH.

The Lippert Hydraulic Landing Gear has been static tested to over 6,000continuous cycles without any noticeable wear to rotating or sliding parts. It isrecommended that when operating in harsh environments and conditions (roadsalt, ice build-up, etc.) the moving parts be kept clean and can be washed withmild soap and water. No grease or lubrication is necessary and in somesituations may be detrimental to the environment and long-term dependability ofthe system.

MECHANICAL

Although the system is designed to be almost maintenance-free, actuate theLanding Gear once or twice a week to keep the seals and internal moving partslubricated.

Check for any visible signs of “leaking” before and after movement of the systemand the coach.

When the Landing Gear is down, visually inspect the Inner and OuterAssemblies. Refer to Fig. 3, pg. 10-11, for location of inner assemblies. Checkfor excess build-up of dirt or other foreign material; remove any debris that maybe present.

If the system squeaks or makes any noises it is permissible to apply a coat oflightweight oil or silicone lubricant spray to the hydraulic rod but remove anyexcess oil so dirt and debris do not build-up. DO NOT USE GREASE.

ELECTRICAL

For optimum performance, the slideout system requires full battery current andvoltage. The battery must be maintained at full capacity. Other than goodbattery maintenance, check the terminals and other connections at the battery,the control switch and the pump motor for corrosion and loose or damagedterminals. Check motor leads under the coach chassis. Since theseconnections are subject to damage from road debris, be sure they are in goodcondition.

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Note: The Lippert Hydraulic Landing Gear is designed to operate as a negativeground system. A negative ground system utilizes the chassis frame as theground source. An independent ground wire back to the battery is not needed. Itis important the electrical components have good wire to chassis contact. Over90% of unit electrical problems can be attributed to bad ground connections.

Note: For long-term storage: It is recommended that the room be closed(retracted) and if your unit is equipped with the IRC room control, it isrecommended all of the control knobs be kept in the closed position.

IF YOU HAVE ANY PROBLEMS OR QUESTIONS CONSULT YOUR LOCALAUTHORIZED DEALER OR CALL LIPPERT AT:

(866) 524-7821.

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AUXILIARY OPERATION

The Lippert Hydraulic Landing Gear can be run with auxiliary power devices likeelectric drills, ratchet wrenches or cordless screwdrivers. In the event ofelectrical or system failure, this manual method of extending and retracting thejacks can be used. A standard handheld drill is allthat is required. See the instructions below.

1. Remove protective label. (See Fig 1).

2. Using a standard hex bit, insert into auxiliary drive device, i.e. cordless drill or screwdriver or ratchet wrench.

3. Insert hex bit into coupler found under protective label, Fig. 2

4. Run drill forward or clockwise to extend slideout room and in reverse or counterclockwise to retract slideout room.

Fig. 1

Fig. 2

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SERVICE

FLUID FILLING PROCEDURE

The Lippert Hydraulic Landing Gear uses automatic transmission fluid (ATF).Any ATF can be used. A full synthetic or synthetic blend works best such asDexron III or Mercon 5. For best operation, fill system within ½” of the top whenall slideouts are completely retracted. The see through reservoir makes it easyto check oil level. It is recommended that the oil level be checked prior tooperating the system. Make sure the breather cap is free of contaminationbefore removing, replacing or installing.In colder temperatures (less than 10° F)the jacks may extend and retract slowly due to the fluid’s molecular nature. Forcold weather operation, fluid speciallyformulated for low temperatures may bedesirable.

Please consult factory before using any other fluids.

FILLING DIRECTIONS

Remove Breather/Fill CapPour ATF into Breather/Fill opening.Note: Do not allow any contamination into reservoir during fill process.Note: Standard reservoir holds approximately 2 quarts (1.89 liters) of ATF.Fill to within ½” of top.Replace Breather/Fill cap when finished.Note: System is self-purging. By simply cycling the system 2-3 times, any air in the system will be forced back to the reservoir and out of the Breather/Fill cap.

Fill Cap

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TROUBLESHOOTING

The Lippert Hydraulic Landing Gear is a feature that allows the owner moreoptions and flexibility for quickly and effectively leveling the unit. It is a totallyintegrated system with your unit’s chassis and electronics.

Every unit has it’s own personality and what may work to fix one unit may notwork on another even if the symptoms appear to be the same.

When something restricts mechanized travel, system performances will beunpredictable. It is very important that Landing Gear be free of contaminationand allowed to travel freely the full distance. Dirt, sand, mud and othercontaminants build-up during travel and can be potentially damaging to theperformance of the system.

When beginning to troubleshoot the system, make sure the battery is fullycharged, there are no visible signs of external damage to the Landing Gear,motor or hoses and that the motor is wired properly and all connections aresecure.

IF YOU HAVE ANY PROBLEMS OR QUESTIONS CONSULT YOUR LOCALAUTHORIZED DEALER OR CALL LIPPERT AT:

(866) 524-7821.

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TROUBLESHOOTING - CHARTJACKS WILL NOT EXTEND TO GROUND, PUMP IS RUNNING

PROBABLE CAUSE CORRECTIVE ACTION

Little or no fluid in reservoir Fill reservoir with DEXRON III ATF, See pg. 6Leg valve is inoperative Clean, repair or replaceElectronic signal is lost between switch Trace wires for voltage drop or loss of signal and leg valves Repair or replace necessary wires or replace

switch. ANY ONE OR TWO JACKS WILL NOT RETRACT

PROBABLE CAUSE CORRECTIVE ACTION

Hose damaged or unconnected Replace with new hose or reconnect hoseReturn valve inoperative Replace inoperative return valveElectronic signal is lost between switch Attempt to retract jacks in MANUAL mode. and solenoid If successful, replace control pad; if not, test

for voltage drop between switch and leg valveRepair bad wiring or replace defective board or

valve.

TROUBLESHOOTING – POWER UNIT

Before attempting to troubleshoot the Power Unit, make sure an adequate powersource is available. The unit batteries should be fully charged or the unit shouldbe plugged into to A/C service with batteries installed. Do not attempt totroubleshoot the Power Unit without assuring a full 12V DC charge.

The following tests require only a DC voltmeter (or DC test light) and a jumperlead.

Step 1 - Attach voltmeter (or test light) leads to the negative and positiveterminals on motor solenoid (See Fig. 7). Does the meter indicate 12V DC?If YES, see Step 2; if NO see Step 3.

Step 2 - If YES, at the motor, check the incoming leads to 12V DC (if necessary,disconnect leads at wire splices). Does meter indicate 12V DC? If YES, PowerUnit needs to be replaced. The motor is not field serviceable. DO NOTATTEMPT TO REPAIR. If NO, Inspect all wires and connections between thewall switch and the motor. Repair connections as necessary. Recheck as inStep 1.

Step 3 - If NO, Inspect all connections between battery and solenoid. Inspect30A Auto-reset Circuit Breaker (See Fig. 7 for location).Recheck as above in Step 1.

Since there are no field serviceable parts in the motor of the Power Unit,electrical troubleshooting and service is limited to replacing only thosecomponents as previously outlined.

Thorough inspection of wiring and connections is the only other electrical servicethat can be performed.

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WIRING DIAGRAM

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